Employer · WARN Act history · Professional & Technical Services
Charles River Laboratories
67 workers across 5 WARN notices, primarily in MD - recorded in the current PlainLayoffs dataset.
- 67
- Workers cut
- 5
- WARN notices
- 1
- State
- 13
- Avg / notice
Charles River Laboratories has 5 recorded WARN filings affecting 67 workers
According to WARN Act filings submitted to state workforce agencies, Charles River Laboratories has 5 recorded filings covering 67 workers across 1 state, primarily MD, the 3,790th-largest recorded WARN footprint among 7,009 tracked employers. WARN notices cover qualifying reported events, so this record is not a complete count of the employer's workforce changes.
Charles River Laboratories is a minor share of Professional & Technical Services WARN activity — 0.3% of the sector's 21,639 workers across 166 employers, ranking #86 in Professional & Technical Services.
How 67 workers split by filing year
Calendar-year totals from WARN notice_date fields in this dataset, the same figures summed in the notice history below.
DOL WARN employer filing desk
Employer CHARLES-RIVE · Charles River Laboratories 67 workers · 5 filings
NOTC-MID · WORK-LIGHT · PHOTO-UNK · RUNWAY-UNDER · STAT-SINGLE · BOOK-SINGLE · TYPE-MIX
- NOTC-MID 5 filings
- WORK-LIGHT #3,790
- PHOTO-UNK No peer
- RUNWAY-UNDER 58d
- STAT-SINGLE MD
- BOOK-SINGLE 1 agency
- TYPE-MIX 4C/1L
Stamps derive from filed notice_date, effective_date, workers_affected, state agency source, and filing type in this dataset, not a prediction of future layoffs.
Largest Charles River Laboratories WARN filings · notice runway
Top 5 rows by workers_affected from this employer's filed notices. Runway = calendar days from notice_date to effective_date when both are published and forward-dated.
- Anne Arundel County, MD · Closure · Professional & Technical Services 20 workers · filed Feb 2, 2026 · 49d runway
- Frederick, MD · Closure · Professional & Technical Services 14 workers · filed Mar 14, 2024 · 60d runway
- Frederick, MD · Closure · Professional & Technical Services 13 workers · filed Apr 2, 2025 · retroactive dates
- Frederick, MD · Layoff · Professional & Technical Services 13 workers · filed Aug 2, 2024 · 59d runway
- Frederick, MD · Closure · Professional & Technical Services 7 workers · filed Jan 29, 2025 · 58d runway
Median forward runway across 5 dated filings: 58 days (4 under 60d · 1 at/above 60d · 1 same-day or retroactive).
What changed - Charles River Laboratories WARN filings by year
Computed from filed notice dates in this dataset (calendar years), not a vendor release label. Latest compared pair: .
- 2025 → 2026: WARN workers affected for Charles River Laboratories held from 20 in 2025 to 20 in 2026; notice count fell from 2 to 1.
Site-wide YoY movers: /changes (RSS). Dataset corrections: /changelog. Year hubs: /year/2026.
Employer Profile
Not all layoffs appear in WARN data, see our methodology for the federal + state coverage thresholds. Latest filing: Feb 2026.
WARN Notice History
2026
Anne Arundel County, MD · Professional & Technical Services
Effective: Mar 23, 2026
20
workers
Filed Feb 2, 2026
2025
Frederick, MD · Professional & Technical Services
Effective: Mar 28, 2025
13
workers
Filed Apr 2, 2025
Frederick, MD · Professional & Technical Services
Effective: Mar 28, 2025
7
workers
Filed Jan 29, 2025
2024
Frederick, MD · Professional & Technical Services
Effective: Sep 30, 2024
13
workers
Filed Aug 2, 2024
Frederick, MD · Professional & Technical Services
Effective: May 13, 2024
14
workers
Filed Mar 14, 2024
Questions about this Charles River Laboratories record
What is the largest Charles River Laboratories WARN filing on record? ▼
The largest row is the facility closure filed for Anne Arundel County, MD on Feb 2, 2026, covering 20 workers in Professional & Technical Services.
Where were Charles River Laboratories's WARN notices filed? ▼
The filings name Anne Arundel County and Frederick; together they form 4 facility closures and 1 mass-layoff filing sourced from Maryland DLLR. States represented in this record: MD.
Does Charles River Laboratories's filing history show a recurring pattern? ▼
The filing history spans 2024 through 2026 across 3 calendar years; that recurrence is visible in the dated rows rather than inferred from news coverage.
How much advance notice appears in Charles River Laboratories's record? ▼
The measurable notice runway is between 30 and 59 days; the WARN pay tool can value the gap, but only a qualified adviser can determine whether an exception applies. Of 5 filings on record, 1 dated effective before the notice itself is excluded from that figure.
See also: MD WARN filings · Professional & Technical Services industry WARNs · WARN Act guide
Source: State WARN Act layoff registries Charles River Laboratories notice history aggregated from state workforce agency filings · September 2026 A WARN filing is a required notice, not a judgment of the employer's management or finances. Coverage follows states with structured public registries; this public-record summary is not legal advice, financial advice, or employment advice.
Every figure on PlainLayoffs is rendered directly from public WARN Act filings and state workforce agency records, no number is typed in by an editor. This employer's notice history is rendered directly from state WARN Act filings. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2026. A WARN filing is a legally required notice, not a judgment of a company's management or financial health; rankings here reflect filed notice volume only.